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#! /bin/bash

### BEGIN INIT INFO
# Provides: freenetis-monitoring
# Required-Start: $remote_fs
# Required-Stop: $remote_fs
# Should-Start: $network $syslog
# Should-Stop: $network $syslog
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# Short-Description: Start and stop freenetis monitoring daemon
# Description: FreeNetIS monitoring script.
### END INIT INFO

################################################################################
# #
# This script serves for monitoring from IS FreeNetIS #
# #
# Author Kliment Michal 2012 #
# Email kliment@freenetis.org #
# #
# Name freenetis-monitoring.init.sh #
# #
################################################################################

# Load variables from config file
CONFIG=/etc/freenetis/freenetis-monitoring.conf

# Name of monitoring daemon
MONITORD="freenetis-monitord"

# Path to monitoring daemon (without name)
MONITORD_PATH="/usr/sbin/"

# Load variables
if [ -e $CONFIG ]; then
. $CONFIG || true
else
echo "Config file is missing at path $CONFIG."
echo "Terminating..."
exit 0
fi

# try to create log file if not exists
if [ ! -e "$LOG_FILE" ] ; then
set +e
touch "$LOG_FILE"
set -e
fi

# disable logging if log cannot be written
if [ ! -w "$LOG_FILE" ]; then
echo "Cannot write to $LOG_FILE file => disabling logging"
LOG_FILE=/dev/null
fi

start_monitor()
{
# test if daemon is already started
if [ `ps aux | grep $MONITORD | grep -v grep | wc -l` -gt 0 ];
then
echo "Already started."
return 0
fi

echo -n "Starting FreenetIS monitor daemon: "

# max priority is set
if [ $MAX_PRIORITY -gt 0 ];
then
# create process for all priority from interval <0;MAX_PRIORITY>
for i in `seq 0 $MAX_PRIORITY`;
do
nohup $MONITORD_PATH$MONITORD $i 1>/dev/null 2>>$LOG_FILE &
done
else
# create one process for all priorities
nohup $MONITORD_PATH$MONITORD 1>/dev/null 2>>$LOG_FILE &
fi

# test if daemon is started
if [ `ps aux | grep $MONITORD | grep -v grep | wc -l` -gt 0 ];
then
echo "OK"
else
echo "FAILED!";
fi
}

stop_monitor()
{
# test if daemon is already stopped
if [ `ps aux | grep $MONITORD | grep -v grep | wc -l` -eq 0 ];
then
echo "Not running."
return 0
fi

echo -n "Stopping FreenetIS monitor daemon: "

# kill all processes
killall -q $MONITORD

# test if daemon is stopped
if [ `ps aux | grep $MONITORD | grep -v grep | wc -l` -eq 0 ];
then
echo "OK"
else
echo "FAILED!";
fi
}

status_monitor()
{
echo -n "FreenetIS monitor daemon is "

# test if daemon is already started
if [ `ps aux | grep $MONITORD | grep -v grep | wc -l` -gt 0 ];
then
echo "running."
else
echo "not running.";
fi
}

version_monitor ()
{
VERSION=`"$MONITORD" version 2>/dev/null`
echo $VERSION
}

usage_monitor()
{
echo "usage: `echo $0` (start|stop|restart|status|version|help)"
}

case "$1" in
start)
start_monitor
exit 0
;;
stop)
stop_monitor
exit 0
;;
restart|reload|force-reload) # reload is same thing as reload
stop_monitor
start_monitor
exit 0
;;
status)
status_monitor
exit 0
;;
version)
version_monitor
exit 0
;;
*)
usage_monitor
exit 0
;;
esac

exit 0
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